Solve the problem.A survey of senior citizens at a doctor's office shows that 52% of the seniors take blood pressure lowering medication and 44% take cholesterol lowering medication. 11% take both medications. What is the probability that a senior citizen takes only one of these medications given that he or she takes at least one of the medications?
A. 0.44
B. 0.52
C. 0.870
D. -0.060
Answer: C
Mathematics
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Change the Cartesian integral to an equivalent polar integral, and then evaluate.
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.A solid sanding machine disk has a radius of 6 cm and a mass of 4 kg. Find its moment of inertia with respect to its axis.
A. 72 kg?cm2 B. 24 kg?cm2 C. 144 kg?cm2 D. 288 kg?cm2
Mathematics
The line graph shows the recorded hourly temperatures in degrees Fahrenheit at an airport. Use the graph to answer the question.
At what time was the temperature 72°?
A. 9 a.m. and 10 a.m. B. 10 a.m. C. 6 p.m. D. 9 a.m.
Mathematics
Simplify the rational expression. If the rational expression cannot be simplified, so state. 
A. cannot be simplified
B. 
C. 3
D. 8
Mathematics